They will let him finish.
Kommie kamaLa's "I'm speaking!" tactic is extremely effective. She wins every time she uses that tactic to instantly shut down Republicans (including former VP Mike Pantsless in 2020 debate, Brett Baier yesterday, and SC Judge Bret Kavanaugh during confirmation hearings).
If someone used that arrogant, condescending tactic towards me, I'd increasingly interrupt them (at optimal times). When someone condescendingly says, "I'm speaking," that means they're angry. Take advantage of that and rile up their anger further by interrupting them, getting them off their word-salad game. You'll soon see them really blow their lid. Game over. But Republicans always get crushed by power-hungry egomaniacal Kommie kamaLa's "I'm speaking" tactic.
RINO VP Mike Pantsless: Weak. Brett Baier: Weak.
Even President Trump was flustered by kamaLa in their debate. When kamaLa talked over President Trump, he got so angry, he said to her, "I'm speaking. Remember that, kamaLa? I'm speaking." (That shows Kommie kamaLa's tactic works against Republicans, so much so that President Trump copied it.)
The better response is to set kamaLa's seething rage against her when she uses that tactic. Interrupt her again and again and she'll totally lose it (then you'll see Kommie kamaLa's rage rise to the surface, no longer the Laughing Hyena).
Laughing Hyena did not laugh even once during the Fox News interview. Her laughing is just a vote-getting act to lure unwitting suburban wine-sipping soccer moms.
TL;DR Entire Campaign: Constant laughter, "I'm speaking," and word salads. (No actual policy discussion.)